Atlas Obscura presents their "Wonders of Salt", nine interesting places around the world based on salt: lakes, buildings, mines, plains, manmade sculptures, or natural caves like Kitum Cave in Kenya.

For a very long time, the source of the abrasions on this cave's walls remained a mystery. Some speculated ancient peoples, possilby Eygptians, were responsible. But no, the carvings in the cave weren't man made at all... elephants had been the culprits all along! The cave is the elephant equivalent of drunk college students raiding their fridge at midnight. Late at night, the Pachiderms go into the cave, get their salt lick on under the cover of darkness, and emerge unseen. Take that, Egyptians! (Unfortunatly the cave is also the site of the deadly Malburg virus, so, visiting the cave is ill advised.)